<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>Document</title>
	</head>
	<body>
		<script type="module">
			//模块整体加载
			//circle.js文件
			export function area(radius){
				return Math.PI* radius* radius;
			}
			export function circumference(radius){
				return 2 * Math.PI * radius;
			}
						......
						
			//index.html文件
			//必须加type="module"
			//需同源
			//部分加载
			import{area,circumference} from './circle.js';
			
			console.log('圆面积：'+area(4));
			console.log('圆周长：'+circumference(14));
			
			//整体加载
			import * as circle from './circle.js';
			
			console.log('圆面积：'+circle.area(4));
			console.log('圆周长：'+circle.circumference(14));
		</script>
	</body>
</html>